fix constructor argument types

src/Node/Expression/BlockReferenceExpression.php

@@ -22,7 +22,10 @@ use Twig\Node\Node;
  */
 class BlockReferenceExpression extends AbstractExpression
 {
-    public function __construct(\Twig_NodeInterface $name, ?Node $template, $lineno, $tag = null)
+    /**
+     * @param Node|null $template
+     */
+    public function __construct(\Twig_NodeInterface $name, $template, $lineno, $tag = null)
     {
         if (\is_bool($template)) {
             @trigger_error(sprintf('The %s method "$asString" argument is deprecated since version 1.28 and will be removed in 2.0.', __METHOD__), E_USER_DEPRECATED);

src/Node/ForNode.php

@@ -25,7 +25,7 @@ class ForNode extends Node
 {
     protected $loop;
 
-    public function __construct(AssignNameExpression $keyTarget, AssignNameExpression $valueTarget, AbstractExpression $seq, ?AbstractExpression $ifexpr, ?\Twig_NodeInterface $body, ?\Twig_NodeInterface $else, $lineno, $tag = null)
+    public function __construct(AssignNameExpression $keyTarget, AssignNameExpression $valueTarget, AbstractExpression $seq, ?AbstractExpression $ifexpr, \Twig_NodeInterface $body, ?\Twig_NodeInterface $else, $lineno, $tag = null)
     {
         $body = new Node([$body, $this->loop = new ForLoopNode($lineno, $tag)]);
 

src/Node/IfNode.php

@@ -21,7 +21,7 @@ use Twig\Compiler;
  */
 class IfNode extends Node
 {
-    public function __construct(?\Twig_NodeInterface $tests, ?\Twig_NodeInterface $else, $lineno, $tag = null)
+    public function __construct(\Twig_NodeInterface $tests, ?\Twig_NodeInterface $else, $lineno, $tag = null)
     {
         $nodes = ['tests' => $tests];
         if (null !== $else) {